diff --git a/Cargo.toml b/Cargo.toml
index 87e216b..710ed2e 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "base64"
-version = "0.21.5"
+version = "0.21.6"
 authors = ["Alice Maz <alice@alicemaz.com>", "Marshall Pierce <marshall@mpierce.org>"]
 description = "encodes and decodes base64 as bytes or utf8"
 repository = "https://github.com/marshallpierce/rust-base64"
diff --git a/RELEASE-NOTES.md b/RELEASE-NOTES.md
index d6d94c5..b4ce666 100644
--- a/RELEASE-NOTES.md
+++ b/RELEASE-NOTES.md
@@ -1,3 +1,7 @@
+# 0.21.6
+
+- Improved introductory documentation and example
+
 # 0.21.5
 
 - Add `Debug` and `Clone` impls for the general purpose Engine